Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7c8217cfa1622c…

MALICIOUS

PDF

43.7 KB Created: 2020-03-26 02:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fddeabf934fd6a57905aa2db3432e6f4 SHA-1: c93264e916745e3327824a580f51901ff4471b08 SHA-256: 9f7c8217cfa1622c1dd6cd781dbcdc176ccdc3e307424826f7b27b299e8fa219
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains text related to 'hookup culture' and the embedded URLs suggest a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent behind the link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sinapsisintegral.com/uploads/1/3/0/8/130873868/130873868.html#discussion+questions+about+hookup+culture
    • http://momentswithmadds.org/uploads/1/3/0/8/130874519/7497787.pdf
    • http://luvofit.com/uploads/1/3/0/7/130739632/059be80a580bd89.pdf
    • http://curatidasolo.com/uploads/1/3/0/6/130620410/1051784.pdf
    • http://tedhoward4u.com/uploads/1/3/0/5/130544447/82e56.pdf
    • http://healthyfoodies.net/uploads/1/3/0/9/130969712/b24b22e.pdf
    • http://refractband.com/uploads/1/3/0/5/130589420/kurikovekur.pdf
    • http://westspecialeducconsulting.com/uploads/1/3/0/4/130478975/keludexez-tejesal-fiwefotuwasotuf-nelipolumo.pdf
    • http://keevitaja.eu/uploads/1/3/1/0/131070588/kamiba_dikakexasazo_zonezo_namejoturif.pdf
    • http://insomniart.com/uploads/1/3/0/5/130544781/nufew_sezejafuwago_ziravulaxaro.pdf
    • http://www.brewtifulmorningsafterfajrllc.com/uploads/1/3/0/4/130488619/69ee51e822df07.pdf
    • http://cibelekrukoski.com/uploads/1/3/0/7/130776428/1776698.pdf
    • http://ameliamrogocka.com/uploads/1/3/0/6/130639444/0353d7556195bde.pdf
    • http://prathamut.org/uploads/1/3/0/4/130476703/lovajoxiririsenijig.pdf
    • http://wavwg.com/uploads/1/3/0/7/130775341/woregubuxeku.pdf
    • http://coastalinspro.com/uploads/1/3/0/7/130775679/719423.pdf
    • http://riessalesandservice.com/uploads/1/3/0/6/130621533/2240686.pdf
    • http://dietofcolours.com/uploads/1/3/0/7/130740571/genesadibodum.pdf
    • http://blingbyage.com/uploads/1/3/0/6/130604046/kureletipudo_supodejefiwiw_watobawazafo_lufimiluki.pdf
    • http://parkwayharbour.com/uploads/1/3/0/5/130590677/pimidawa-wonasuni-reteluxufe-nisodimamuwex.pdf
    • http://salveit.com/uploads/1/3/0/5/130551257/tanujuvurogojafe.pdf
    • http://www.thebomboraco.com/uploads/1/3/0/5/130544138/zakasetukewok.pdf
    • http://stdesignmatters.com/uploads/1/3/0/4/130488543/besawajixus.pdf
    • http://rowanprssa.com/uploads/1/3/0/5/130541597/gomuwu.pdf
    • http://selahtimes.com/uploads/1/3/0/8/130813403/6110042.pdf
    • http://rowanprssa.com/uploads/1/3/0/5/130541597/gomuw
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082e8.bin
5fd20d1b4884553a2953c6de0930d53b619ea9cd78f499fa65f6c42280fb3df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E8 7632 bytes

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